Rare term for a traditional Japanese carpenter's square, synonymous with 曲尺 (かねじゃく) or 指矩 (さしがね). Used in woodworking contexts.
See also: 曲尺
A carpenter's square is a tool that carpenters use to draw right-angled lines on wood.
Rare kanji spelling for a carpenter's square. The form 矩差し is also recorded.
Variant spelling with okurigana. Both kanji forms are rare; the tool is more commonly referred to as 曲尺 (かねじゃく) or simply さしがね.
Compound of 矩 (かね, 'right angle') and 差し (ざし, from 差す, 'to measure' or 'to apply'). The exact historical derivation is uncertain; the spelling is conventionally associated with carpentry tools.